Hand brake



April 23,v 1929. s. B. HAsELTlNE HAND BRAKE Filed May 6, 1927 Patented Apr. 23, 1929.

UNITED kSTATES n 1,710,213 PATENT OFFICE.

STACY B. HASELTINE, F CHICAGO, ILLINOIS, ASSIGNOR TO W. HaMINER, INC., OF

CHICAGO, ILLINOIS, A CORPRATION OF DELAWARE, y

HAND BRAKE.

Application ledMay S,

lThis invention relates to hand brakes.

An object of the invention is to provide a hand brake' including operating mechanism adapted to rotate the brake staff to wind the brake chain thereon, and a holding dog for preventing reverse rotation of the brake sta-li', the latter including an extension by means of which the holding dog may be released, in conjunction with locking mechanism automatically engageable with said extension when movedl in ya releaing direction to maintain the dog inoperative and permit complete unwinding of the brake chain from the stall, said locking mechanism being automatically disengageable through moveinent of the operating means when it is again desired to set the brake. v

A more particular object of the invention is to provide locking mechanism of the charaeter above 'referred to wherein a lever is pivotally connected with the outer end of the release extension in such manner as to provide acam portion adjacent the pivotal connection adapted to engagea iixed abutment, such as a portion of the brake bracket, so as to force the release extension in a direction to release the dog, and after being moved a predetermined distance, to hold the dog out of engagingposition, said lever when in position to hold the dog out of engagement being disposed in the path of the operating mechanism whereby' movement of they latter ina direction to effect ,winding movement of the brake stall' moves the lever and overcomes the locking engagement of the cam andpermits the lever to 'resume initial position. j f

Other and further objects of the invention will more clearly Vand fully appear from the description and claims hereinafter following. l

ln the drawings forming a part of this specification, AFigure 1 is vertical sectional view through the end wall of a car, showing a side elevational view of the brake mechanism with my improvements incorporated therein, the operating lever being shown in its normal depending inoperative positionr `in full lines and in raised operativeposition 'in dotted line.L Figure*r 2 is ay horizontal sectionalfview of the invention corresponding substantially to the line 2-2 of Figure 1 showing the releasing lever kfor the dog :in normal inoperative position in full lines, and in locking position 'in dotted lines.

1927. serial No. 189,201.

ind Figure 3 is a fragmentary front elevational view of the brake mechanism showing the invention embodied therein.

shown in the drawings, the end wall of the car is indicated at 10, and to the end wa l is secured a housing or bearing ybracket designated generally by the reference character 11. The housing 11 is secured to the wally 10 by suitable rivets 12-12, and pro- `iecting into the housingis the usual vertical brake stall", a portion of which is indicated at 13, the stati2 having a square or other noncircular cross section at the top thereof on which is rigidly iitted a ratchet wheel indicated at 514i, the ratchet wheel being provided with lower and uppersets of teeth in the usual manner. Oscillatably mounted within the housingll is a carrier or fulcrum niember 15, said fulcrum member being adapted to swi? g' about the axis of the ratchet wheel on suitable journals provided by the ratchet wheel and the housing in a manner common to this type of brake. The fulcrum member 15 provided with a pivot bolt 16 which extends through the side walls thereof and swingably mounted u on the bolt 16 is an operating lever 17. he lever 17 is provided with a pawl 18 urged outwardly by 'means of a spring 19 in `such manner that when the operating lever 17 is raised to horizontal position, the p'awl 18 engages the teeth of the ratchet wheel 111 and oscillationof the `operating lever 17 effects rotation of the ratchet wheel lll and hence of the 13, in a direction to wind the brake chain thereon. Y

To holdv the staff 13 against reverse rotation, a locking dog 20 is provided, said dog being pivotally mounted upon a verticallyy extending bolt 21 in the housing 11, said dog having a tooth 22 at one end adapted toengage the ratchet wheel, and the toothed end of4 the dog being normally urged toward engaged position with the ratchet wheel byy meansoil" a coiled spring 23 interposed between the wall of the housing and the toothed end of the dog. Thedog 20 is provided with a tail or lever extension 24, which ispreferably disposed at a slight angle to the toothed portion of the dog yand extends outwardly oi the housing l1 a suitable distance,

as best shown .in Figure 2. lC10-operating kwith the extension 2d of the dog 20 is a release lever 25. The lever 25 at its inner end is providedwith an oil-set 26, having a bifui-cated extension including the furcations 27-27 disposed upon opposite sides of the outer end olI the extension 24% oi the dog 2O and pivotally secured ktheretoby means of rivet 28. Each of Ithe furcations 27.4.2?A

is provided with a llat lace 29 adapted in the normal position vof the parts to coincide with the adjacent face of the extension 24, and to rest against the fixedv abutment 30 provided by a portion of 'the bracket 11, so that the spring 23 bearing on the toothed end or" the dog presses the extension 2l and the lla faces `29--e29 of' the lever 25 agar t tine abutment 30, and hence maintains the lever 25 in inoperative position as best sliovn in full lines in igiire 2. The ifiircations 27 are each'providcd with acam tace indicated at 31, andivitha locking face indicated at'32, both of whichV are adapted to engage with the kabutment 30 vwhen' the lever is swung A through an operative movement to the position indicated dotted line in Figure 2. The onter'end of the lever 25 indicated at v is curved asshown, and the fulcrum memberv'l is provided with an oli-set Se? located Y in such position as Vto be in line with the sta the ordinary manner, the ratchet movementV outer end 33 of the lever 25 When the latter is in position to Vhold the dog disengaged,

whereby oscillationk velI the iulcrum member 15 causes engagement of the ol-set with the lever 25 to move the saine in such manner kto break the locking engagement of the lever 25ivith the dog 20 and permit the lever 25 to resume'inoperative posit-ion. f

."ln operation, when it is desired to Winde 13 during the Winding operation, in'

ofthe dog Vbeing permitted. Assuming the brakes torhave been fully set, and it is desired to release the same, the operating lever 1T is vdropped to its normal dependingposii -lion, and the lever 25 grasped by the operator and pulled in a counter-clockwise rection. This. brings about pivotal movement of the lever 25 upon .the'pivot 28 carried by the extension 24 on thedog 20, causing the cam tacel to bear against the abutA ment 30, which exerts force upon the extenV sion 2doi tiedog 20 to move the same in a counter-clockwise direction, continued movement ot the lever 2,5 in the direction Aindicated ,causing the locking face 32r toV come into ei agement Witlrthe abutment 30 Which prevents the lever 25 Vfrom returnvmovement Y locksV theVV dog20 out of enrespect to the ratchetwheel and consequently* ga gement 'with the lo'l 'ng face 32, ai'ter which, due to the dispos on ci the cam iace 31 and tnepivetal connection off the lever 25 with the dog 20, the extension 24 or the dog, under the influence ol' the spring 23, is n 'essed toward ille abutment 80, causing return of the lever 25 to its normal disengagedposition.

d/liile l have herein shovfn and described what l .consider 'the preferred manner of carrying' out the invention, the same is merely illustrative, and l contemplate all ohanoes and modilieations which come Within the scope o1" the claims appended hereto.

l claim: 1. ln ya hand bralmthe coinbinationwith a member adapted to 'be rotatedto elect tightening of a brake chain; ot a ratchet Wheel rotatable with said member; a pivoted locking dogv co-operable with said ratchet Wheel, said dog being normally urged to operative position and provided with an extension; lever having cam means at one end, said lever being pivotally oonnected'to said extension atafpoint inwardly of said cam means, said cam means being provided with a flat face at one side; and an abutment co-operative'ivith the flatV vface of said cam means for maintaining said lever in predeterminedV position, swinging of said lever in one direction from predetermined position serving to Vretract said vlocking dog from engagement with said ratchet wheel.

k2. tln a handbrale,tl1e combination with nmember adapted to beY rotated to'cflect tightening kol a -brale chain;` or' -a` ratchet Wheel rotatable vwith said member; a pivoted lockingA dog co-operable with saidratchet Wheel, said dog being normally `urged to operative position and provided with an extension; va lever havingcammeans at one end, saidlever being pivotally connected to said extension kat point inwardly osaid cam means, said cam means being provided with ya ilat face at one side; an abutment cla-operative with the flat face of said cam means for maintaininop said lever in predetermined position, swingingof said lever in one direction from predeterminedposition serving to retract said locking dog from engagement with said ratchet- Wheel, said cam means being providedrfith anlocling face engageable withY said abutment after predetermined movement of said lever'tolocl said lever and cam means in position/to maintain said locking dog out of engagementwith said ratchet Wheel; and operating` means for rotating said member' in a Winding direction, said operating means having elements engageable With said lever when the same is in locking position to move the same and break the locking connection between said cam means and saidabutment and permit said lever to resume its initial position.

3. In a hand brake, the combination with a member adapted to be rotated to eHect tightening oi a brake chain; of a ratchet -Wheel rotatable With said member; operating means for the ratchet Wheel, including a handle; a pivoted locking dog (3o-operable with said ratchet Wheel; spring means for normally urging said dog to ratchet engaging position; a fixed abutment; means yfor disengaging said dog from the ratchet In witness` that I claimy the foregoing I have hereunto subscribed my name this 3rd day of May, 1927. y

f STACY B. HASELTINE. 

